My ds seems to be doing that weird thing that cats do when they're sitting on your lap trying to get miolk out of your knee...

Does anyone know what I''m talking about or does it just sound ridiculous?When i feed ds (almost 6 mo) it's as if he's trying to knead my breast and is sometimes accompanied by a bit of writhing about. He doesn't seem in any distress but it blimmin well hurts (even with his nails cut it scratches but he's also pretty strong!)Is there any reason for this or is it just one of these random things babies do (dd never did)?

I remember dd doing the opposite nipple twiddling...He seems to do it just as let down occurs but often continues for the rest of the feed.He seems to enjoy it but I think i might have to try and cover up a bit as it really hurts!